Report Layout and Design - JasperReports for Java Developers - page 130

public class ReportExpressionsDemoServlet extends HttpServlet
{
protected void doGet(HttpServletRequest request, HttpServletResponse
response) throws ServletException, IOException
{
Connection connection;
ServletOutputStream servletOutputStream =
response.getOutputStream();
InputStream reportStream = getServletConfig().getServletContext().
getResourceAsStream("/reports/ReportExpressionsDemo.jasper");
try
{
Class.forName("com.mysql.jdbc.Driver");
connection = DriverManager.getConnection("jdbc:mysql://
localhost:3306/flightstats?user=dbuser&password=secret");
JasperRunManager.runReportToPdfStream(reportStream,
servletOutputStream, new HashMap(), connection);
connection.close();
response.setContentType("application/pdf");
servletOutputStream.flush();
servletOutputStream.close();
}
catch (Exception e)
{
// display stack trace in the browser
StringWriter stringWriter = new StringWriter();
PrintWriter printWriter = new PrintWriter(stringWriter);
e.printStackTrace(printWriter);
response.setContentType("text/plain");
response.getOutputStream().print(stringWriter.toString());
}
}
}